LC786821E Datasheet, PDF (22/35 Pages) ON Semiconductor – Compressed Audio Signal Processor IC

LC786821E
SD Memory Card Interface
- Characteristics of SD Memory Card Input/Output Timing
tSDCKL tSDCKH
SDCCLK
(Output)
1/fSDCKF
SDCMDIO
(Inout)
SDCDAT[3:0]
(Inout)
tSDCMS
tSDCMH
tSDCDS
tSDCDH
tSDCMO
tSDCDO
*Relationship between signal name and pin
SDCCLK
: GP34
SDCMDIO
SDCDAT[2] : GP37
SDCDAT[1]
: GP35
: GP32
SDCDAT[3] : GP36
SDCDAT[0] : GP33
Parameter
Symbol
Signal Names
Min Typ Max Unit
SDCCLK Clock Frequency
SDCCLK "H" Period
SDCCLK "L" Period
fSDCKF
tSDCKH
tSDCKL
SDCCLK
SDCCLK
SDCCLK
6.0
MHz
83.3
83.3
Command Input Set-Up Time tSDCMS SDCMDIO, SDCCLK
30.0
Command Input Hold Time
tSDCMH SDCMDIO, SDCCLK
30.0
Command Output Settle Time tSDCMO SDCMDIO, SDCCLK
Data Input Set-Up Time
tSDCDS SDCDAT[3:0], SDCCLK 30.0
Data Input Hold Time
tSDCDH SDCDAT[3:0], SDCCLK 30.0
Data Output Settle Time
tSDCDO SDCDAT[3:0], SDCCLK
30.0
ns
30.0
Note: Internal microcontroller (ARM7) must be used in normal mode. It cannot be used in low speed mode.
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